currentname - returns the most recently resolved nameSynopsis:
currentname -> name true
currentname returns the most recently resolved name whose contents
is still under execution.
currentname is useful for error handling purposes where a procedure
has to know the name with which it has been called.
currentname /DivisionByZero raiseerror
This function is not foolproof, as it will fail for bound procedures.
currentname evaluates certain debugging information on the execution
stack. Note that the SLI interpreter can be compiled not to generate
this information. In this case currentname fails, i.e. it will always